UFCThe Ultimate Fighting Championship (UFC) is a U.S.-based mixed martial arts organization, recognized as the largest MMA promotion in the world. The UFC is headquartered in Las Vegas, Nevada and is owned and operated by Zuffa, LLC. This promotion is responsible for solidifying the sport's postion in the history-books.
UFC is currently undergoing a remarkable surge in popularity, along with greater mainstream media coverage. UFC programming can now be seen on FOX, FX, and FUEL TV in the United States, as well as in 35 other countries worldwide.

Apr 24, 2012 - As anticipated, the UFC has scrapped plans to hold Anderson Silva's championship rematch against Chael Sonnen in a soccer stadium in Rio de Janeiro, Brazil.

The blockbuster grudge match, which was originally booked for UFC 147 on June 23, has now been rescheduled to headline UFC 148 on July 7, 2012 at the MGM Grand Garden Arena in Las Vegas, NV. UFC President Dana White announced the switch at a press conference in Rio on Tuesday morning.

Previously, White cited difficulties obtaining a proper venue in Brazil due to a United Nations Conference on Sustainable Development booked for the same week. The conference runs from June 20-22 and lists 194 member nations among its attendees.

With Silva-Sonnen II shifted off the card, UFC 147 now features a middleweight match-up between The Ultimate Fighter: Brazil coaches Vitor Belfort and Wanderlei Silva, the TUF: Brazil featherweight and middleweight finals, and a heavyweight bout between Fabricio Werdum and Mike Russow.

UFC featherweight champion Jose Aldo may also be moved onto the card. Aldo is currently scheduled to fight a yet to be announced opponent at UFC 149.

A venue for UFC 147 has yet to be finalized. UFC officials originally targeted the Estádio Olímpico Joăo Havelange, a colossal soccer stadium that could potentially seat upwards of 50,000 Brazilian fight fans.